I used to play Chess when I was much younger and could beat pretty much everyone I knew by age 10-11. That's not saying an awful lot because I didn't know anyone particular good, and that was really the problem.
I lived in a town of about 10,000 at the time (and later in a town of 15-20,000 up until the end of high school) so didn't really have the opportunity to learn and get better. This was before the internet and playing a computer isn't quite the same thing.
It's something I'm a little disappointed about because I wish I'd had that opportunity by living somewhere bigger.
You learn from people who are better than you far more than those that are worse than you.
In university I met up with someone I'd gone to high school with (until he moved). He'd become something of a gun when it came to pool (eight ball). He used to practice 6 hours a day (I later learned) and won a junior state championship. He could beat pretty much any of us with his eyes closed. Once he beat someone when he was drunk only playing with one hand and won convincingly.
I used to play with him and actually got pretty good. By pretty good I mean I could take a game from him maybe 1 in 10-15. Against pretty much anyone else I did extremely well and even did well in the odd local comp (second place I think was my best).
That's what I mean about getting the opportunity to get better.